A GIS stores information about the world as a collection of thematic ______ that can be li

计算机 公共英语 已帮助 人

A GIS stores information about the world as a collection of thematic ______ that can be linkedtogether by geography.

A.files

B.objects

C.document

D.layers

热搜:初始t细胞是指从未接受过抗原刺激的尚未成熟的t细胞